A331442 Length of n-th chain in A331440.

5, 8, 10, 9, 11, 11, 11, 11, 8, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 20, 16, 41, 31, 28, 28, 31, 54, 21, 9, 36, 11, 24, 23, 32, 10, 37, 42, 12, 27, 46, 16, 40, 27, 6, 19, 45, 13, 42, 42, 37, 61, 37, 98, 93, 18, 44, 33, 19, 59, 35, 54, 166, 131

Offset: 1

Author

N. J. A. Sloane, Jan 22 2020

Keywords

• nonn
• base

Examples

			When starting chain 9, A331440(77) is set to the first free number which is 17, and the chain becomes 17, 34, 68, 136, 272, 544, 1088, 2176 with length 8.
		

Links

• Lars Blomberg, Table of n, a(n) for n = 1..3000
• Rémy Sigrist, PARI program for A331442

Crossrefs

Cf. A331440, A331441.

Programs

PARI

See Links section.

Extensions

Corrected a(9) and more terms from Lars Blomberg, Jan 22 2020