A115429
Numbers k such that the concatenation of k with k+8 gives a square.
Original entry on oeis.org
6001, 6433, 11085116, 44496481, 96040393, 115916930617, 227007035017, 274101929528, 434985419768, 749978863753, 996004003993, 1365379857457948, 1410590590957816, 1762388551055953, 2307340946901148, 2700383162251217
Offset: 1
6001//6009 = 7747^2, where // denotes concatenation.
96040393//96040400 = 98000200 * 98000202.
96040393//96040397 = 98000199 * 98000203.
96040393//96040392 = 98000198 * 98000204.
Cf.
A030465,
A102567,
A115426,
A115437,
A115428,
A115430,
A115431,
A115432,
A115433,
A115434,
A115435,
A115436,
A115440.
A116315
Numbers k such that k*(k+2) gives the concatenation of two numbers m and m+4.
Original entry on oeis.org
3, 6, 44, 55, 38162, 61837, 83617, 346979, 653020, 950050, 8647554, 9534264, 8167822282, 9007920991, 9209900791, 9950000500, 4737445289220, 4990568257186, 5009431742813, 5262554710779, 8373808925584
Offset: 1
A116336
n times n+3 gives the concatenation of two numbers m and m+7.
Original entry on oeis.org
3, 89, 3677, 6321, 8787, 48744, 51254, 87618, 3762555, 6237443, 9217101, 3266298275, 3520463765, 6479536233, 6733701723, 8063694649, 8317860139, 4689524709430934475, 5310475290569065523, 7416797436703661748
Offset: 1
A116344
Numbers k such that k*(k+2) gives the concatenation of two numbers m and m+8.
Original entry on oeis.org
464, 535, 717, 821, 3427, 6572, 90906, 980201, 3636360, 6363639, 41176467, 58823532, 413533837, 426573429, 428571425, 432620008, 567379991, 571428574, 573426570, 586466162, 686261110, 725274728, 727272724, 731321307
Offset: 1
Showing 1-4 of 4 results.
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