A075403 Smallest k such that the difference between the k-th triangular number and the following prime is equal to n.

2, 1, 5, 28, 10, 48, 13, 15, 65, 160, 58, 80, 106, 32, 162, 91, 94, 188, 70, 127, 62, 304, 201, 120, 394, 103, 141, 244, 382, 455, 301, 380, 521, 700, 625, 212, 721, 611, 681, 979, 277, 815, 1201, 1275, 569, 4588, 558, 2331, 5113, 1704, 1337, 2551, 2101

Offset

0,1

Comments

Index of the first occurrence of n in A075402.

Links

Donovan Johnson, Table of n, a(n) for n = 0..500

Prog

(PARI) for(n=1, 100, f=0:for(k=1, 50000, if(nextprime(k*(k+1)/2)-k*(k+1)/2==n, f=k:break)):print1(f", "))

Crossrefs

Cf. A075402.

Sequence in context: A184300 A317390 A370163 * A260503 A236436 A187618

Adjacent sequences: A075400 A075401 A075402 * A075404 A075405 A075406

Keyword

nonn

Author

Amarnath Murthy, Sep 23 2002

Extensions

Corrected and extended by Ralf Stephan, Mar 19 2003

Status

approved