A066549 Let N = 235711171923293137..., the concatenation of the primes. a(n) is the n-digit number formed from the digits of N starting from the {n(n-1)/2 +1}th digit. Omit any leading zeros.

2, 35, 711, 1317, 19232, 931374, 1434753, 59616771, 737983899, 7101103107, 10911312713, 113713914915, 1157163167173, 17918119119319, 719921122322722, 9233239241251257, 26326927127728128, 329330731131331733

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Module[{nn=500, cp}, cp=Flatten[IntegerDigits/@Prime[Range[nn]]]; Table[ FromDigits[ Take[cp, {(2-n+n^2)/2, (n(n+1))/2}]], {n, (Sqrt[1+8nn]-1)/2}]] (* Harvey P. Dale, Jul 07 2016 *)

Crossrefs

Cf. A033308, A066547.

Sequence in context: A350340 A266320 A112442 * A279734 A277294 A191807

Adjacent sequences: A066546 A066547 A066548 * A066550 A066551 A066552

Keyword

nonn,base

Author

Amarnath Murthy, Dec 16 2001

Extensions

More terms from Sascha Kurz, Jan 28 2003

Status

approved