A383291 Successively larger gaps in happy numbers start at this happy number.

1, 32, 49, 109, 139, 409, 496, 566, 3392, 4287, 5364, 358962, 488444, 4488044, 59299951, 59999665, 88889733, 488849933, 569199933, 5888999662, 3888899909932

Offset: 1

Author

Shyam Sunder Gupta, Apr 22 2025

Keywords

• nonn
• base
• more

Examples

			1 and 7 are successive happy numbers and so the first gap is 6. 32 and 44 are successive happy numbers and this is the first gap larger than 6, so 32 is in the sequence as the succeeding term to 1.
		

Links

• Shyam Sunder Gupta, Happy Numbers, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 7, 209-222.

Crossrefs

Cf. A007770.

Extensions

a(21) from Amiram Eldar, Apr 26 2025