cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A306953 Weird numbers with a record gap to the next weird number.

Original entry on oeis.org

70, 836, 1372630, 2384270, 25206790, 31463110, 251684230, 2013240988, 200598443570
Offset: 1

Views

Author

Amiram Eldar, Mar 17 2019

Keywords

Comments

The record gap values are 766, 3194, 3640, 4182, 4620, 4900, 5040, 6682, 6720.

Examples

			70 is in the sequence since it is the first weird number and the next weird number after it is 836 = 70 + 766. The next gap which is larger than 766 occurs at 836 which is followed by 4030 = 836 + 3194.

Crossrefs

Cf. A006037, A125109, A306747.

Extensions

a(9) from Giovanni Resta, May 25 2020

A306952 Lesser member of twin weird numbers: weird numbers n (A006037) such that n+2 is also weird.

Original entry on oeis.org

512468, 540890, 688028, 1390268, 1565828, 1741388, 2268068, 3525410, 3848108, 4374788, 6481508, 6657068, 7534868, 7885988, 7914410, 8089970, 8838968, 9143330, 9290468, 10021130, 10343828, 10898930, 12654530, 12801668, 12872510, 13152788, 13181210, 14234570
Offset: 1

Views

Author

Amiram Eldar, Mar 17 2019

Keywords

Comments

Number of terms below 10^k for k = 6, 7, ... 10: 19, 231, 2111, 22426.
The first occurrences of 2 consecutive pairs of twin weirds are (21607670, 21607672, 21608090, 21608092), (873951608, 873951610, 873951890, 873951892), ...

Examples

			512468 is in the sequence since both 512468 and 512470 are weird numbers.

Links

Crossrefs

Cf. A006037, A125109, A231086 (supersequence), A231964.
Showing 1-2 of 2 results.

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