A367340 List of distinct (positive) numbers appearing in A367338.

11, 12, 22, 23, 24, 33, 34, 35, 36, 44, 45, 46, 47, 48, 55, 56, 57, 58, 59, 61, 66, 67, 68, 69, 71, 72, 73, 77, 78, 79, 81, 82, 83, 84, 85, 88, 89, 91, 92, 93, 94, 95, 96, 97, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118

Offset

1,1

Comments

This is the list of comma-successors.

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

Prog

(Python)
def cp(n):
    y = int(str(n)[0])
    x = (n-y)%10
    k = n - y - 10*x
    kk = k + 10*x + y-1
    return k if k > 0 and int(str(kk)[0]) != y-1 else -1
def ok(n): return n > 0 and cp(n) > 0
print([k for k in range(1, 119) if ok(k)]) # Michael S. Branicky, Dec 18 2023

Crossrefs

Cf. A121805, A367338, A367339, A367341.

Sequence in context: A192287 A084855 A367612 * A101233 A118512 A112651

Adjacent sequences: A367337 A367338 A367339 * A367341 A367342 A367343

Keyword

nonn,base

Author

N. J. A. Sloane, Nov 15 2023

Status

approved