A105296 Primes formed by concatenation of 5 consecutive triangular numbers.

36101521, 435465496528561, 48514950505051515253, 1522515400155761575315931, 3213132385326403289633153, 3315333411336703393034191, 3631536585368563712837401

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

a(1)=36101521 because 36101521 is the prime formed by concatenation of 5 consecutive triangular numbers i.e. 3,6,10,15 and 21.

Crossrefs

Sequence in context: A064586 A183593 A183755 * A362964 A254389 A254396

Adjacent sequences: A105293 A105294 A105295 * A105297 A105298 A105299

Keyword

base,nonn

Author

Shyam Sunder Gupta, Apr 25 2005

Status

approved