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A348074

a(n) = A035327(n) if n is even, 3n + 1 if n is odd.

1, 4, 1, 10, 3, 16, 1, 22, 7, 28, 5, 34, 3, 40, 1, 46, 15, 52, 13, 58, 11, 64, 9, 70, 7, 76, 5, 82, 3, 88, 1, 94, 31, 100, 29, 106, 27, 112, 25, 118, 23, 124, 21, 130, 19, 136, 17, 142, 15, 148, 13, 154, 11, 160, 9, 166, 7, 172, 5, 178, 3, 184, 1, 190, 63 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..64.`
	EXAMPLE	`n parity function a(n)` `= ===== ========= ======` `0 even A035327(0) 1` `1 odd 31 + 1 4` `2 even A035327(2) 1` `3 odd 33 + 1 10` `4 even A035327(4) 3` `5 odd 3*5 + 1 16`
	PROG	`(Python)` `def A348074(n):` `if n%2==0:` `if n==0: return 1` `else: return (1<<int.bit_length(n)) - n - 1 #A035327(n)` `else: return 3n+1` `(Python)` `def A348074(n): return 3n+1 if n&1 or n==0 else (~n)^(-1<<n.bit_length()) # Chai Wah Wu, Dec 20 2022`
	CROSSREFS	`Cf. A006370, A035327.` `Sequence in context: A262370 A108759 A158824 * A334161 A039806 A030320` `Adjacent sequences: A348071 A348072 A348073 * A348075 A348076 A348077`
	KEYWORD	`nonn`
	AUTHOR	`Alexander Van Plantinga, Sep 27 2021`
	STATUS	`approved`

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Last modified September 11 13:05 EDT 2024. Contains 375829 sequences. (Running on oeis4.)