A382715 The term in A377091 that immediately precedes n, or 0 if n does not appear in A377091.

0, 1, -1, 3, 4, -3, 6, 7, 13, 9, 10, 11, -12, 18, 14, 15, 16, -18, 20, 21, 25, 23, 19, 28, -24, 22, 26, 27, 30, 31, 32, -32, 29, 33, 34, 35, 36, 37, 38, 39, 40, -39, 42, 43, 44, 45, 46, 47, 48, 49, -49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, -59, 62, 63, 64, 65

Offset: 1

Author

N. J. A. Sloane, Apr 09 2025

Keywords

• sign

Comments

It is a strong conjecture that every integer appears in A377091, so it is unlikely there will be a second 0 term.

Examples

			A377091(9) = -3 is followed by A377091(10) = 6, so a(6) = -3.
		

Links

• N. J. A. Sloane, Table of n, a(n) for n = 1..10060
• N. J. A. Sloane, Table of n, a(n) for n = 1..125060

Crossrefs

Cf. A377091, A379059, A379789, A382716, A382717, A382718.