A367615 Numbers that have a comma-successor.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75

Offset

1,2

Comments

This is the complement to A367341.

The actual successors are given in A367340.

See A367338 for definition.

Links

Michael S. Branicky, Table of n, a(n) for n = 1..10000

Eric Angelini, Michael S. Branicky, Giovanni Resta, N. J. A. Sloane, and David W. Wilson, The Comma Sequence: A Simple Sequence With Bizarre Properties, arXiv:2401.14346, Youtube

Mathematica

fQ[n_]:=Module[{k=n+10*Last[IntegerDigits[n]]+Range[9]}, Select[k, #-n==FromDigits[{Last[IntegerDigits[n]], First[IntegerDigits[#]]}]&]]!={};
Select[Range[75], fQ[#]&] (* Ivan N. Ianakiev, Dec 18 2023 *)

Crossrefs

Cf. A121805, A367338, A367340, A367341

Sequence in context: A325360 A325400 A342523 * A249830 A300473 A271980

Adjacent sequences: A367612 A367613 A367614 * A367616 A367617 A367618

Keyword

nonn,base

Author

N. J. A. Sloane, Dec 18 2023

Extensions

More terms from Michael S. Branicky, Dec 18 2023

Status

approved