A342780 - OEIS

A342780

Positions of words in A342753 in which 1st digit = last digit.

1, 2, 3, 4, 7, 10, 11, 12, 14, 16, 17, 18, 22, 23, 25, 26, 27, 32, 34, 35, 37, 38, 39, 40, 42, 46, 49, 50, 52, 53, 55, 56, 57, 58, 60, 61, 63, 68, 70, 73, 74, 76, 77, 79, 80, 82, 83, 84, 85, 87, 88, 90, 92, 96, 100, 103, 104, 106, 109, 110, 112, 113, 115

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Every positive integer is in exactly one of the sequences A342780 and A342781.

LINKS

Table of n, a(n) for n=1..63.

EXAMPLE

Positions of the first 6 words in which 1st digit = last digit can be read from a list of the first 16 words in A342753: 0, 00, 1, 000, 01, 10, 0000, 001, 100, 010, 00000, 11, 0001, 0100, 1000, 0010.

MATHEMATICA

(See A342753.)

CROSSREFS

Cf. A342753, A342781.

Sequence in context: A375723 A082673 A080724 * A089589 A047546 A266530

Adjacent sequences: A342777 A342778 A342779 * A342781 A342782 A342783

KEYWORD

nonn,base

AUTHOR

Clark Kimberling, Apr 11 2021

STATUS

approved