A092614 - OEIS

A092614

Let p_i(n) = n-th prime ending in i; then a(n) = (p_1(n) + p_3(n) + p_7(n) + p_9(n))/10.

4, 9, 16, 23, 28, 38, 46, 53, 61, 71, 78, 87, 97, 111, 118, 128, 133, 146, 154, 161, 169, 186, 193, 200, 219, 228, 239, 248, 259, 267, 274, 287, 298, 313, 319, 331, 348, 358, 372, 378, 392, 400, 408, 417, 426, 447, 461, 466, 475, 487, 502, 515, 523, 537, 543

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

OFFSET

1,1

LINKS

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

MATHEMATICA

Table[ A092613[n]/10, {n, 60}] (* Robert G. Wilson v, Apr 13 2004 *)

PROG

(PARI) {k=56; m=matrix(9, k); v=[1, 0, 1, 0, 0, 0, 1, 0, 1]; c=vector(9); p=2; d=0; while(d<4, p=nextprime (p+1); r=p%10; c[r]++; if(c[r]<=k, m[r, c[r]]=p; if(c[r]==k, d++))); w=v*m/10; for(j=1, k, print1(w[j], ", "))}

CROSSREFS

First differences are in A093723.

A092613/10.

Sequence in context: A001639 A309138 A162207 * A313351 A085899 A027874

Adjacent sequences: A092611 A092612 A092613 * A092615 A092616 A092617

KEYWORD

easy,nonn,base

AUTHOR

Jorge Coveiro, Apr 11 2004

EXTENSIONS

More terms and PARI code from Klaus Brockhaus, Apr 12 2004

More terms from Robert G. Wilson v, Apr 13 2004

STATUS

approved