A054052 -id:A054052 - cp's OEIS frontend

A060420 Least decimal digit in n-th prime.

2, 3, 5, 7, 1, 1, 1, 1, 2, 2, 1, 3, 1, 3, 4, 3, 5, 1, 6, 1, 3, 7, 3, 8, 7, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 1, 2, 1, 2, 2, 0, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 1, 1, 1, 3, 3, 3, 4, 4, 1, 3, 4, 4, 4, 1, 4, 0, 0, 1, 2, 1, 4, 5, 3, 5, 1

Offset: 1

Labos Elemer, Apr 05 2001

a(n) = 0 mostly. - David A. Corneth, Aug 29 2019

David A. Corneth, Table of n, a(n) for n = 1..10000

Cf. A054054, A054055, A054052.

a(n) = vecmin(digits(prime(n))); \\ Michel Marcus, Jan 26 2017

Table[Min[IntegerDigits[Prime[w]]], {w, 1, 1000}]

Offset 1 from Michel Marcus, Aug 29 2019

A054053 Number of nonisomorphic connected n-state automata with binary inputs and outputs.

Original entry on oeis.org

4, 126, 7336, 665120, 80038860, 11992785628, 2148752458832, 448000621008112, 106551292402319492, 28471977293653977714, 8445425847422222518488, 2753705028193531309816184, 978990839708922602845440908, 376905974468378563863272876248, 156221832236610857130449469228920, 69360325968752963320307268181976608

Offset: 1

Vladeta Jovovic, Apr 29 2000

nonn

Inverse Euler transform of A054052.

F. Harary and E. Palmer, Graphical Enumeration, 1973. [See Section 6.5, pp. 146-150.]

Christian G. Bower, PARI programs for transforms, 2007.
Michael A. Harrison, A census of finite automata, Canad. J. Math., 17, No. 1 (1965), 100-113. [See Table III, p. 112.]
N. J. A. Sloane, Maple program for transforms, 2001-2020.

Cf. A000282, A054052, A054742.

/* This program is a modification of Christian G. Bower's PARI program for the inverse Euler transform from the link above. */
lista(nn) = {local(A=vector(nn+1)); for(n=1, nn+1, A[n]=if(n==1, 1, A054052(n-1))); local(B=vector(#A-1, n, 1/n), C); A[1] = 1; C = log(Ser(A)); A=vecextract(A, "2.."); for(i=1, #A, A[i] = polcoeff(C, i)); A = dirdiv(A, B); } \\ Petros Hadjicostas, Mar 08 2021

Terms a(14)-a(16) from Petros Hadjicostas, Mar 08 2021

cp's OEIS Frontend

A060420 Least decimal digit in n-th prime.

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