A284063 Numbers whose smallest decimal digit is 2.

2, 22, 23, 24, 25, 26, 27, 28, 29, 32, 42, 52, 62, 72, 82, 92, 222, 223, 224, 225, 226, 227, 228, 229, 232, 233, 234, 235, 236, 237, 238, 239, 242, 243, 244, 245, 246, 247, 248, 249, 252, 253, 254, 255, 256, 257, 258, 259, 262, 263, 264, 265, 266, 267, 268

Offset

1,1

Comments

Numbers n such that A054054(n) = 2.

Prime terms are in A106102.

Links

Table of n, a(n) for n=1..55.

Mathematica

Select[Range[300], Min[IntegerDigits[#]] == 2 &] (* Alonso del Arte, Mar 19 2017 *)

Prog

(Magma) [n: n in [1..100000] | Minimum(Setseq(Set(Sort(&cat[Intseq(n)])))) eq 2]
(PARI) isok(n) = vecmin(digits(n)) == 2; \\ Michel Marcus, Mar 25 2017
(Python)
def ok(n): return '2' == min(str(n))
print([m for m in range(269) if ok(m)]) # Michael S. Branicky, Feb 22 2021

Crossrefs

Cf. Sequences of numbers whose smallest decimal digit is k (for k = 0..9): A011540 (k = 0), A284062 (k = 1), this sequence (k = 2), A284064 (k = 3), A284065 (k = 4), A284066 (k = 5), A284067 (k = 6), A284068 (k = 7), A284069 (k = 8), A002283 (k = 9).

Sequence in context: A141236 A079032 A325485 * A153826 A080283 A228112

Adjacent sequences: A284060 A284061 A284062 * A284064 A284065 A284066

Keyword

nonn,base

Author

Jaroslav Krizek, Mar 19 2017

Status

approved