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A105298
Primes formed by concatenation of 7 consecutive triangular numbers.
0
1596165317111770183018911953, 6216632864416555667067866903, 33930341913445334716349803524535511, 38226385033878139060393403962139903, 1066530106799110694531070916107238010738451075311, 1119756112125311227511124250112575011272511128753
OFFSET
1,1
EXAMPLE
a(1)=1596165317111770183018911953 because 1596165317111770183018911953 is the prime formed by concatenation of 7 consecutive triangular numbers i.e. 1596,1653,1711,1770,1830,1891 and 1953.
MATHEMATICA
Select[FromDigits[Flatten[IntegerDigits[#]]]&/@ Partition[Accumulate[Range[ 2000]], 7, 1], PrimeQ] (* Harvey P. Dale, Mar 17 2013 *)
CROSSREFS
Sequence in context: A146561 A181309 A095448 * A003853 A003846 A375122
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Apr 25 2005
EXTENSIONS
More terms from Harvey P. Dale, Mar 17 2013
STATUS
approved