A272685 a(n) = smallest m such that A265432(m) = A272684(n), or -1 if no such m exists.

1, 15, 14, 13, 12, 217, 0, 215, 45, 213, 44, 43, 209, 42, 207, 2, 573, 1327, 572, 130, 185, 570, 1492, 569, 78, 568, 128, 567, 1318, 1498, 565, 188, 564, 10, 563, 1312, 562, 1504, 1309, 560, 1507, 693, 74, 558, 1510, 557, 192, 2360, 6085, 350, 1480, 708, 6083, 3643

Offset: 1

Author

Nathan Fox, Brooke Logan, and N. J. A. Sloane, May 24 2016

Keywords

• nonn
• base

Comments

It is conjectured that all terms of A272684 eventually appear in A265432.

See A273369 for a version that ignores the fact that terms in A272671 ending in 0 cannot appear in A265432.

Examples

			A272684(1) = 6 first appears in A265432 at index 1, so a(1) = 1.
A272684(7) = 225 first appears in A265432 at index 0, so a(7) = 0.
		

Crossrefs

Cf. A272684, A272671, A265432.

See A273369 for another version.