A166713 Alliterative-digit numbers: Positive integers n such that the English names of the decimal digits of n begin with the same letter; ignore single-digit numbers.

11, 22, 23, 32, 33, 44, 45, 54, 55, 66, 67, 76, 77, 88, 99, 111, 222, 223, 232, 233, 322, 323, 332, 333, 444, 445, 454, 455, 544, 545, 554, 555, 666, 667, 676, 677, 766, 767, 776, 777, 888, 999, 1111, 2222, 2223, 2232, 2233, 2322, 2323, 2332, 2333, 3222, 3223

Offset: 1

Author

Rick L. Shepherd, Oct 19 2009

Keywords

• base
• easy
• nonn
• word

Comments

The multi-digit repdigits (A014181) are a subsequence. No term contains the digit 0 (zero). All terms containing digits 1 (one), 8 (eight), or 9 (nine) are also terms of A014181. Any term not mentioned above is a string of 2's (twos) and 3's (threes) only (a multi-digit term of A032810), 4's (fours) and 5's (fives) only, or 6's (sixes) and 7's (sevens) only.

Examples

			454 is a term as digits "four", "five", "four" each begin with the letter "f".
		

Crossrefs

Cf. A146755, A014181, A032810.